In paragraph 3 the author suggests that we do our homework for an important social occasion because ______.A、only careful preparation can make our talks polished
B、homework can help us learn from our own mistakes
C、we need inspiration for memorable and moving talks
D、it is necessary to avoid harsh criticism from the supervisors
【正确答案】：A
【题目解析】：原因目的题。有题干定位于第三段，从第二句话可以得出答案A是正确的，其他选项无从得知。